| // Copyright (C) 2020 Alexey Shvayka. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| |
| /*--- |
| esid: sec-object.keys |
| description: > |
| Property names are returned in ascending chronological order of creation |
| that is unaffected by [[DefineOwnProperty]]. |
| info: | |
| Object.keys ( O ) |
| |
| [...] |
| 2. Let nameList be ? EnumerableOwnPropertyNames(obj, key). |
| 3. Return CreateArrayFromList(nameList). |
| |
| EnumerableOwnPropertyNames ( O, kind ) |
| |
| [...] |
| 2. Let ownKeys be ? O.[[OwnPropertyKeys]](). |
| [...] |
| |
| OrdinaryOwnPropertyKeys ( O ) |
| |
| [...] |
| 3. For each own property key P of O that is a String but is not an array index, |
| in ascending chronological order of property creation, do |
| a. Add P as the last element of keys. |
| [...] |
| 5. Return keys. |
| features: [Proxy] |
| includes: [compareArray.js] |
| ---*/ |
| |
| var obj = {}; |
| Object.defineProperty(obj, "a", { |
| get: function() {}, |
| set: function(_value) {}, |
| enumerable: true, |
| configurable: true, |
| }); |
| obj.b = 2; |
| Object.defineProperty(obj, "a", {value: 1}); |
| assert.compareArray(Object.keys(obj), ["a", "b"]); |
| |
| var fn = () => {}; |
| fn.a = 1; |
| Object.defineProperty(fn, "length", {enumerable: true}); |
| assert.compareArray(Object.keys(fn), ["length", "a"]); |